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A Secure Microgrid Data Storage Strategy with Directed Acyclic Graph Consensus Mechanism

Intelligent Automation & Soft Computing 2023年第9期37卷 2609-2626页

作者： Jian shang Runmin guan Wei Wang College of Computer and Information Hohai UniversityNanjing211100China Division of Research and Innovation Jiayuan Technology Co.Ltd.Nanjing211100China

The wide application of intelligent terminals in microgrids has fueled the surge of data amount in recent *** real-world scenarios,microgrids must store large amounts of data efficiently while also being able to withstand malicious *** meet the high hardware resource requirements,address the vulnerability to network attacks and poor reliability in the tradi-tional centralized data storage schemes,this paper proposes a secure storage management method for microgrid data that considers node trust and directed acyclic graph(DAG)consensus ***,the microgrid data storage model is designed based on the edge computing *** blockchain,deployed on the edge computing server and combined with cloud storage,ensures reliable data storage in the ***,a blockchain consen-sus algorithm based on directed acyclic graph data structure is then proposed to effectively improve the data storage timeliness and avoid disadvantages in traditional blockchain topology such as long chain construction time and low consensus ***,considering the tolerance differences among the candidate chain-building nodes to network attacks,a hash value update mechanism of blockchain header with node trust identification to ensure data storage security is *** results from the microgrid data storage platform show that the proposed method can achieve a private key update time of less than 5 *** the number of blockchain nodes is less than 25,the blockchain construction takes no more than 80 mins,and the data throughput is close to 300 *** with the traditional chain-topology-based consensus methods that do not consider node trust,the proposed method has higher efficiency in data storage and better resistance to network attacks.

关键词： Microgrid data security storage node trust degree directed acyclic graph data structure consensus mechanism secure multi-party computing blockchain

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Hydrothermal synthesis of ultrathin Bi2MO6（M=W,Mo） nanoplates as new host substances for red-emitting europium ion

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Progress in Natural Science:Materials International 2012年第4期22卷 334-340页

作者： Mingyun guan Xianghong He Tongming shang Jianhua Sun Quanfa Zhou Jiangsu Key Laboratory of Precious Metals Chemistry School of Chemistry and Environmental EngineeringJiangsu Teachers University of Technology

Ultrathin Bi2MO6(M=W, Mo) nanoplates were synthesized by a simple hydrothermal method. SEM, EDS and XRD were used to investigate the morphologies and compositions of the samples from BiONO3 nanoplates along with some nanoparticles, to precursory Bi2WO6 nanoplates and Bi2MoO6 nanoparticles, and to final Bi2MO6 nanoplates. The possible formation mechanism of products was proposed. The experimental results exhibited that Bi2MO6 nanoplates had stronger light adsorption in ultraviolet-visible range. Bi2MO6 nanoplates were useful host for rare earth ions, Eu3t was successfully doped in Bi2MO6 nanoplates and an energy efficiently transferred from Bi3t to Eu3t , displaying intense red color under ultraviolet (UV) light excitation. The morphologies of products kept constant after doping. It is suggested that Bi2MO6:Eu nanoplates have promising application in fluorescent mark.

关键词： Nanoplate Bismuth tungstate and molybdate Fluorescence properties

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A Single-Cell RNA Sequencing Profiles the Developmental Landscape of Arabidopsis Root

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Molecular Plant 2019年第5期12卷 648-660页

作者： Tian-Qi Zhang Zhou-Geng Xu guan-Dong shang Jia-Wei Wang National Key Laboratory of Plant Molecular Genetics(NKLPMG) CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology(SIPPE)Shanghai 200032P.R.China University of Chinese Academy of Sciences Shanghai 200032P.R.China shanghaiTech University Shanghai 200031P.R.China

Cells of eukaryotic multicellular organisms have inherent *** advances in single-cell gene expression studies enable us to explore transcriptional regulation in dynamic development processes and highly heterogeneous cell *** this study,using a high-throughput single-cell RNA-sequencing assay,we found that the cells in Arabidopsis root are highly heterogeneous in their transcriptomes.A total of 24 putative cell clusters and the cluster-specific marker genes were *** spatial distribution and temporal ordering of the individual cells at different developmental stages illustrate their hierarchical structures and enable the reconstruction of continuous differentiation trajectory of root ***,we found that each root cell cluster exhibits distinct patterns of ion assimilation and hormonal ***,our study reveals a high degree of heterogeneity of root cells and identifies the expression signatures of intermediate states during root cell differentiation at single-cell *** also established a web server(http://***/rootatlas/)to facilitate the use of the datasets generated in this study.

关键词： Arabidopsis root scRNA-seq cell atlas differentiation trajectory meristem

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Source apportionment and ecological risk assessment of PAHs in surface sediments from the Liaodong Bay,northern China

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Acta Oceanologica Sinica 2018年第4期37卷 12-21页

作者： ZHANG Yufeng WU Jinhao SONG Lun SONG yonggang YANG Meng WANG Nianbin HAN Jiabo guan Daoming College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266100 China Liaoning Ocean and Fisheries Science Research Institute Dalian 116023 China Liaoning Ocean Environment Monitoring Station Dalian 116023 China Dalian Environmental Monitoring Center Dalian 116023 China National Marine Environmental Monitoring Center Dalian 116023 China

The sources and ecological risk from sixteen polycyclic aromatic hydrocarbons in surface sediment in the Liaodong Bay were investigated from 2014 to *** total concentrations of PAHs ranged from 88.5 to 347.1 ng/g,and the high value occurred in the central region of the Liaodong *** analysis identified two site clusters representing the coastal region affected by land-based pollution and the central region of the Liaodong *** component analysis-multiple linear regression and diagnostic ratios suggested that PAHs contaminants originated from a mixture of combustion and petroleum sources,and the major was combustion *** on sediment quality guideline,naphthalene,acenaphthylene,acenaphthene,phenanthrene and dibenz[a,h]anthracene may occasionally cause adverse biological effects in some *** toxic equivalent concentrations of carcinogenic PAHs indicated low carcinogenic risk for the Liaodong *** ecological risk and toxic pollution levels of PAHs were higher in the central region than in the coastal region along the Liaodong Bay.

关键词： polycyclic aromatic hydrocarbons Liaodong Bay source apportionment ecological risk assessment,sediment

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Characteristics of Deformation Layer for Vermicular Iron under Dry Sliding Friction

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Journal of Iron and Steel Research International 2004年第3期11卷 44-47页

作者： SUN Le-min shang guan-bao ZHANG Yong-zhen CHEN Yue Henan University of Science and Technology

At room temperature,dry sliding wear tests were carried out using pin-on-disc test rig,in which the pin is made of vermicular iron and the disc is made of 40 Cr *** microstructures of the frictional surfaces for the pin specimens were *** the action of both frictional heat and frictional shearing stress,aplastic deformation layer under the frictional surface is *** morphology and properties of the plastic deformation layer depend on specimen material,contact pressure and frictional shearing *** the plastic deformation layer,the phosphorous mass percent varies at different depth and results in different *** the outer side of surface,the hardness is the biggest and the phosphorous mass percent is the *** become gradually small from outer side to inner side of the surface.

关键词： vermicular iron dry sliding plastic deformation layer

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Establishing carrier transport channels based on Ti-S bonds and enhancing the photocatalytic performance of MXene quantum dots-ZnIn2S4 for ammonia

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InfoMat 2024年第4期6卷 83-97页

作者： Xueying Cheng Renquan guan Zhengkai Wu Yingnan Sun Weilong Che Qingkun shang Faculty of Chemistry Northeast Normal UniversityChangchunthe People's Republic of China Instrumental Analysis Center Yancheng Teachers UniversityYanchengthe People's Republic of China Faculty of Chemistry and Chemical Engineering Yancheng Institute of TechnologyYanchengthe People's Republic of China

In the process of photocatalytic synthesis of ammonia,the kinetics of carrier separation and transport,adsorption of nitrogen,and activation of the N N triple bond are key factors that directly affect the efficiency of converting nitro-gen to ***,we report a new strategy for anchoring MXene quan-tum dots(MXene QDs)onto the surface of ZnIn2S4 by forming Ti-S bonds,which provide a channel for the rapid separation and transport of charge car-riers and effectively extend the lifespan of photogenerated *** unique charge distribution caused by the sulfurization of the MXene QDs further enhances the performance of the photocatalysts for the adsorption and activa-tion of *** photocatalytic ammonia synthesis efficiency of MXene QDs-ZnIn2S4 can reach up to 360.5μmol g�1 h�*** functional theory calculations,various in situ techniques,and ultrafast spectroscopy are used to characterize the successful construction of Ti-S bonds and the dynamic nature of excited state charge carriers in MXene QDs-ZnIn2S4,as well as their impact on nitrogen adsorption activation and photocatalytic ammonia synthesis *** study provides a new example of how to improve nitrogen adsorp-tion and activation in photocatalytic material systems and enhance charge carrier dynamics to achieve efficient photocatalytic nitrogen conversion.

关键词： carrier transport channels nitrogen adsorption and activation photocatalytic synthesis of ammonia Ti-S bonds

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Dynamics of ecosystem carbon stocks during vegetation restoration on the Loess Plateau of China

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Journal of Arid Land 2016年第2期8卷 207-220页

作者： WANG Kaibo DENG Lei REN Zongping SHI Weiyu CHEN Yiping shang-guan Zhouping State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of Sciences State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area Xi'an University of Technology

In the last few decades, the Loess Plateau had experienced an extensive vegetation restoration to reduce soil erosion and to improve the degraded ecosystems. However, the dynamics of ecosystem carbon stocks with vegetation restoration in this region are poorly understood. This study examined the changes of carbon stocks in mineral soil （0-100 cm）, plant biomass and the ecosystem （plant and soil） following vegetation restoration with different models and ages. Our results indicated that cultivated land returned to native vegetation （natural restoration） or artificial forest increased ecosystem carbon sequestration. Tree plantation sequestered more carbon than natural vegetation succession over decades scale due to the rapid increase in biomass carbon pool. Restoration ages had different effects on the dynamics of biomass and soil carbon stocks. Biomass carbon stocks increased with vegetation restoration age, while the dynamics of soil carbon stocks were affected by sampling depth. Ecosystem carbon stocks consistently increased after tree plantation regardless of the soil depth; but an initial decrease and then increase trend was observed in natural restoration chronosequences with the soil sampling depth of 0-100 cm. Moreover, there was a time lag of about 15-30 years between biomass production and soil carbon sequestration in 0-100 cm, which indicated a long-term effect of vegetation restoration on deeper soil carbon sequestration.

关键词： ages carbon stocks natural vegetation restoration tree plantation Loess Plateau

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Synthesis and Crystal Structure of 5-[(1H-1,2,4-Triazol-1- yl)methyl]-4-(2,3-dimethoxybenzylideneamino)-2-2H-1,2,4-triazole-3(4H)-thione Monohydrate

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Chinese Journal of Structural Chemistry 2006年第6期25卷 673-676页

作者： XU Liang-Zhong shang Yu-Qing YU guan-Ping LI Kai SI Guo-Dong College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China

The title compound 5-[（1H-1,2,4-triazol-1-yl）methyl]-4-（2,3-dimethoxy-benzylideneamino）- 2H-1,2,4-triazole-3（4H）-thione monohydrate 4 has been synthesized by the treatment of 4-amino-3-（ 1,2,4-triazol- 1-yl）- 1 H- 1,2,4-triazole-5（4H）-thione 3 with 2,3-dimethoxybenzaldehyde. It crystallizes as a monohydrate in the triclinic system, space group P1^- with a = 8.147（2）, b = 10.820（2）, c = 10.835（2）A, α= 73.770（6）, β = 84.916（7）,γ = 70.679（6）°, C14H17N7O35, Mr = 363.41, V= 865.4（2）A^3, Z= 2, Dc = 1.395 g/cm^3, F（000） = 380, μ = 0.217 mm^-1, the final R = 0.0400 and wR = 0.0975 for 3454 unique reflections. The dihedral angles made by the thione-substituted triazole ring with the other triazole ring and benzene ring are 74.92（3） and 14.81（2）°, respectively. There are some weak hydrogen bonds and C-H..π supramolecular interactions in the lattice, forming a three-dimensional network, which stabilizes the crystal structure.

关键词： 1,2,4-triazole crystal structure synthesis

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Wettability control of defective TiO_(2)with alkyl acid for highly efficient photocatalytic ammonia synthesis

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Nano Research 2023年第8期16卷 10770-10778页

作者： Renquan guan Xueying Cheng Yunning Chen Zhengkai Wu Zhao Zhao Qingkun shang Yingnan Sun Zaicheng Sun Faculty of Chemistry Northeast Normal UniversityChangchun 130024China Faculty of Physics Northeast Normal UniversityChangchun 130024China Instrumental Analysis Center Yancheng Teachers UniversityYancheng 224007China Center of excellence for environmental safety and biological effects Beijing Key Lab for Green Catalysis and SeparationFaculty of Environment and lifeBeijing University of TechnologyBeijing 100124China

Ammonia is an important chemical raw material and non-carbon-based *** ammonia production technology as a mild alternative to the traditional Harbor–Bosch route is carried out at the air,liquid,and solid three-phase *** the activation of N_(2),depressing hydrogen evolution reaction(HER),and increasing the local N_(2) concentration around the catalyst surface are critical factors in achieving high conversion *** this paper,we proposed that defective TiO_(2)is surfacemodified by alkyl acids with different carbon chain lengths(C_(2),C_(5),C_(8),C_(11),and C_(14))to tune the catalyst surface *** defect sites greatly promote N_(2) adsorption and *** wettability of the catalyst can be regulated from hydrophilic to hydrophobic by the length of the alkyl *** hydrophobic surface enhances the N_(2) adsorption and increases the local N_(2) concentration due to its ***,it depresses the proton adsorption and ***,the nitrogen reduction reaction(NRR)is greatly *** the series of samples,they present a systematic change and have a maximal NRR performance for n-octanoic acid-defective TiO_(2)(C8-Vo-TiO_(2);Vo=oxygen vacancy).The rate of ammonia production can be as high as 392μmol·g^(−1)·h^(−1).This work provides a new strategy for efficient ammonia synthesis at the three-phase interface using photocatalyst technology.

关键词： aerophilic modification alkyl acids defective TiO_(2) photocatalytic ammonia synthesis

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Correlation analysis between characteristics under gastroscope and image information of tongue in patients with chronic gastritis

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Journal of Traditional Chinese Medicine 2022年第1期42卷 102-107页

作者： shang Zimeng DU Zhengguang guan Bei JI Xingyu CHEN Longchang WANG Yongji MA Yun Clinical College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100013China College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100069China Department of Gastroenterology Beijing Traditional Chinese Medicine Hospital Affiliated to Capital Medical UniversityBeijing 100010China Cooperative Innovation Center Institute of SoftwareChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Computer Science Institute of Softwarethe Chinese Academy of SciencesBeijing 100190China

OBJECTIVE:To explore the correlation between diagnostic information of tongue and gastroscopy results of patients with chronic ***:Frequent pattern growth(FP-Growth),SPSS Modeler was used to analyze the correlation rules between the image information of tongue parameters and the characteristics of the stomach and duodenum seen under ***:Ranking in order of confidence:cyanotic tongue,slippery fur,yellow fur and spotted tongue were sequently associated with both gastric antrum mucosal hyperemia or edema and gastric antrum mucosal erythema/macula.L,one value of tongue coating color,which counted among(30,60),tooth-marked tongue and b,one value of tongue coating color,which counted in the range of(5,20)were sequently associated with gastric antrum mucosal erythema/macula.A,one value of tongue body color,which counted in the range of(0,20),was related to both gastric antrum mucosal hyperemia or edema and gastric antrum mucosal erythema/macula.a,one value of tongue coating color,which counted in the range of(15,35),was associated with gastric antrum mucosal erythema/*** are a total of 9 strong correlation ***:Cyanotic tongue,slippery fur,yellow fur,the CIE Lab value of tongue coating,a,the value of tongue body color,spotted tongue,and tooth-marked tongue are all related to the gastric antrum mucosal hyperemia or edema and gastric antrum mucosal erythema/*** conditions of gastric mucosa could be predicted by the examination of the above related image information of tongue.

关键词： gastritis tongue stomach duodenum correlation of data frequent pattern growth algorithm

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